The average American spends some 90,000 hours at work during their lifetime, but 80% are outright dissatisfied with their work.

For that overwhelming majority, the secret to job satisfaction might just be a new company. Glassdoor, a job site with 45 million company reviews, has just released its annual Employees’ Choice Awards for the Best Places to Work.

The rankings are compiled from anonymous employee feedback that former or current workers can provide right on Glassdoor. To compile the listing, Glassdoor scans their massive database of company reviews.

Workers writing a company review are asked to assess the pros and cons of working at the company, growth opportunities, compensation and benefits, culture and values, senior management, work/life balance, if they would recommend the workplace to a friend, and the company's six-month business outlook.

Those reviews are compiled in Glassdoor's awards algorithm, which also assesses the quality of reviews represented in its ranking.

Then, companies receive a score on a scale of one to five — five being the highest. The scores have been rounded to the nearest tenth in our article, while Glassdoor ranked the companies by looking at their score rounded to the thousandth. The employers on this list scored between 4.2 and 4.6 on Glassdoor; the average company rating is 3.4.

Here is a countdown of the best 50 workplaces, along with their headquarters location, a description of the company from Glassdoor, and a quote from a current or former employee. You can see all 100 companies on Glassdoor.

50. Crowe

Glassdoor

Score: 4.3

Headquarters location: Chicago

Crowe is an accounting, technology, and consulting firm.

"Very flexible work environment, with the ability to work remotely as needed. The company also strives to push career advancement of every employee." — Crowe audit business analyst

49. Johnson & Johnson

Mel Evans/AP Photo

Score: 4.3

Headquarters location: New Brunswick, New Jersey

Johnson & Johnson is a biotech and pharmaceuticals company.

"Great people, great culture, and the company really cares about their employees. Really good work life balance and flexibility to work remote."— Johnson & Johnson manager

48. SpaceX

SpaceX/Wiki Commons

Score: 4.3

Headquarters location: Hawthorne, California

SpaceX is an aerospace company dedicated to making human life on Mars possible.

"SpaceX believes in its employees and its missions so much, that they invest in you and you invest in the company. All our employees are owners of the company."— SpaceX employee